You’re asked a lot of questions when you’re an assistant coach for your son’s Little League team, as I was for two years, but with a new season underway I’m reminded that the two I heard most often last year were also the …

Cases of chronic traumatic encephalopathy (CTE) are rising among football players, but detecting the condition is challenging. Researchers now say they have a way of picking up buildup of a protein that signals the disease.